Text-to-speech synthesis using a natural voice source. - Stephen D. Pearson; Hector R. Javkin; Kenji Matsui; Takahiro Kamai (ICSLP, 1990)

Improving naturalness in text-to-speech synthesis using natural glottal source. - Kenji Matsui; Stephen D. Pearson; Kazue Hata; Takahiro Kamai (ICASSP, 1991)

An experimental Japanese/English interpreting video phone system. - Murat Karaorman; Ted H. Applebaum; Tatsuro Itoh; Mitsuru Endo; Yoshio Ohno; Masakatsu Hoshimi; Takahiro Kamai; Kenji Matsui; Kazue Hata; Steve Pearson; Jean-Claude Junqua (ICSLP, 1996)

Study on strained rough voice as a conveyer of rage. - Yumiko O. Kato; Yoshifumi Hirose; Takahiro Kamai (INTERSPEECH, 2008)